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import os
import pathlib
import shlex
import shutil
import string
import subprocess
import sys
import tempfile
import unittest
import warnings
import zipfile
import mpi4py
on_pypy = hasattr(sys, "pypy_version_info")
on_ci = any((
os.environ.get("GITHUB_ACTIONS") == "true",
os.environ.get("TF_BUILD") == "True",
os.environ.get("CIRCLECI") == "true",
))
def find_executable(exe):
command = shlex.split(exe)
executable = shutil.which(command[0])
if executable:
command[0] = executable
return shlex.join(command)
return None
def find_mpiexec(mpiexec="mpiexec"):
mpiexec = os.environ.get("MPIEXEC") or mpiexec
mpiexec = find_executable(mpiexec)
if not mpiexec and sys.platform.startswith("win"):
I_MPI_DIR = pathlib.Path(os.environ.get("I_MPI_DIR", ""))
mpiexec = str(I_MPI_DIR / "bin" / "mpiexec.exe")
mpiexec = shutil.which(mpiexec)
if mpiexec:
mpiexec = shlex.quote(mpiexec)
if not mpiexec and sys.platform.startswith("win"):
MSMPI_BIN = pathlib.Path(os.environ.get("MSMPI_BIN", ""))
mpiexec = str(MSMPI_BIN / "mpiexec.exe")
mpiexec = shutil.which(mpiexec)
if mpiexec:
mpiexec = shlex.quote(mpiexec)
return mpiexec
def launcher(np):
mpiexec = find_mpiexec()
python = shlex.quote(sys.executable)
if "coverage" in sys.modules:
python += " -m coverage run -p"
module = "mpi4py.run -rc threads=False"
command = f"{mpiexec} -n {np} {python} -m {module}"
return shlex.split(command)
def execute(np, cmd, args=""):
mpi4pyroot = pathlib.Path(mpi4py.__path__[0]).resolve().parent
pythonpath = os.environ.get("PYTHONPATH", "").split(os.pathsep)
pythonpath.insert(0, str(mpi4pyroot))
mpiexec = launcher(np)
if isinstance(cmd, str):
cmd = shlex.split(cmd)
if isinstance(args, str):
args = shlex.split(args)
command = mpiexec + cmd + args
env = os.environ.copy()
env["PYTHONPATH"] = os.pathsep.join(pythonpath)
env["PYTHONUNBUFFERED"] = "1"
p = subprocess.Popen(
command,
env=env,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
)
stdout, stderr = p.communicate()
return p.returncode, stdout.decode(), stderr.decode()
@unittest.skipIf(not find_mpiexec(), "mpiexec")
class BaseTestRun(unittest.TestCase):
def assertMPIAbort(self, stdout, stderr, message=None):
patterns = (
"MPI_Abort", # MPICH
"MPI_ABORT", # Open MPI
"aborting MPI_COMM_WORLD", # Microsoft MPI
)
if on_pypy and message == "KeyboardInterrupt":
patterns += (
"EXIT STRING: Interrupt (signal 2)", # MPICH
"exited on signal 2 (Interrupt)", # Open MPI
)
aborted = any(
mpiabort in output
for output in (stdout, stderr)
for mpiabort in patterns
)
if aborted:
if message is not None and not on_ci:
self.assertIn(message, stderr)
return
if not (stdout or stderr) or on_ci:
with warnings.catch_warnings():
warnings.simplefilter("always")
warnings.warn(
"expecting MPI_Abort() message in stdout/stderr",
RuntimeWarning,
2,
)
return
raise self.failureException(
"expecting MPI_Abort() message in stdout/stderr:\n"
f"[stdout]:\n{stdout}\n[stderr]:\n{stderr}\n"
)
class TestRunScript(BaseTestRun):
pyfile = "run-script.py"
def execute(self, args="", np=1):
dirname = pathlib.Path(__file__).resolve().parent
script = dirname / self.pyfile
return execute(np, shlex.quote(str(script)), args)
def testSuccess(self):
success = "Hello, World!"
for np in (1, 2):
status, stdout, stderr = self.execute(np=np)
self.assertEqual(status, 0)
self.assertEqual(stdout.count(success), np)
self.assertEqual(stderr, "")
def testException(self):
message = string.ascii_uppercase
excmess = f"RuntimeError: {message}"
for np in (1, 2):
for rank in range(np):
args = ["--rank", str(rank), "--exception", message]
status, stdout, stderr = self.execute(args, np)
if on_ci and status == 221:
continue
self.assertEqual(status, 1)
self.assertMPIAbort(stdout, stderr, excmess)
def testSysExitCode(self):
errcode = 7
for np in (1, 2):
for r in sorted({0, np - 1}):
args = ["--rank", str(r), "--sys-exit", str(errcode)]
status, stdout, stderr = self.execute(args, np)
self.assertIn(status, (errcode, 1))
self.assertMPIAbort(stdout, stderr)
self.assertNotIn("Traceback", stderr)
def testSysExitMess(self):
exitmsg = string.ascii_uppercase
for np in (1, 2):
for r in sorted({0, np - 1}):
args = ["--rank", str(r), "--sys-exit-msg", exitmsg]
status, stdout, stderr = self.execute(args, np)
self.assertEqual(status, 1)
self.assertMPIAbort(stdout, stderr, exitmsg)
self.assertNotIn("Traceback", stderr)
def testInterrupt(self):
from signal import SIGINT
excmess = "KeyboardInterrupt"
for np in (1, 2):
for rank in range(np):
args = ["--rank", str(rank), "--interrupt"]
status, stdout, stderr = self.execute(args, np)
if on_ci and status == 221:
continue
if not on_pypy:
self.assertEqual(status, SIGINT + 128)
self.assertMPIAbort(stdout, stderr, excmess)
class TestRunDirectory(TestRunScript):
directory = "run-directory"
@classmethod
def setUpClass(cls):
cls.tempdir = pathlib.Path(tempfile.mkdtemp())
cls.directory = cls.tempdir / cls.directory
cls.directory.mkdir(parents=True)
topdir = pathlib.Path(__file__).parent
script = topdir / super().pyfile
pymain = cls.directory / "__main__.py"
shutil.copy(script, pymain)
cls.pyfile = cls.directory
@classmethod
def tearDownClass(cls):
shutil.rmtree(cls.tempdir)
class TestRunZipFile(TestRunScript):
zipfile = "run-zipfile.zip"
@classmethod
def setUpClass(cls):
cls.tempdir = pathlib.Path(tempfile.mkdtemp())
cls.zipfile = cls.tempdir / cls.zipfile
topdir = pathlib.Path(__file__).parent
script = topdir / super().pyfile
with zipfile.ZipFile(cls.zipfile, "w") as f:
f.write(script, "__main__.py")
cls.pyfile = cls.zipfile
@classmethod
def tearDownClass(cls):
shutil.rmtree(cls.tempdir)
class TestRunModule(BaseTestRun):
def execute(self, module, np=1):
return execute(np, "-m", module)
def testSuccess(self):
module = "mpi4py.bench --no-threads helloworld"
message = "Hello, World!"
for np in (1, 2):
status, stdout, stderr = self.execute(module, np)
self.assertEqual(status, 0)
self.assertEqual(stdout.count(message), np)
self.assertEqual(stderr, "")
class TestRunCommand(BaseTestRun):
def execute(self, command, np=1):
return execute(np, "-c", shlex.quote(command))
def testArgv0(self):
command = "import sys; print(sys.argv[0], flush=True)"
status, stdout, stderr = self.execute(command, 1)
self.assertEqual(status, 0)
self.assertEqual(stdout.strip(), "-c")
self.assertEqual(stderr.strip(), "")
def testSuccess(self):
command = "from mpi4py import MPI"
for np in (1, 2):
status, stdout, stderr = self.execute(command, np)
self.assertEqual(status, 0)
self.assertEqual(stdout, "")
self.assertEqual(stderr, "")
def testException(self):
command = "; ".join((
"from mpi4py import MPI",
"comm = MPI.COMM_WORLD",
"comm.Barrier()",
"comm.Barrier()",
"comm.Get_rank() == {} and (1/0)",
"comm.Barrier()",
))
excmess = "ZeroDivisionError:"
for np in (1, 2):
for rank in range(np):
status, stdout, stderr = self.execute(command.format(rank), np)
if on_ci and status == 221:
continue
self.assertEqual(status, 1)
self.assertMPIAbort(stdout, stderr, excmess)
if __name__ == "__main__":
unittest.main()
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